2 files changed, 15 insertions, 0 deletions
diff --git a/src/core/strs.c b/src/core/strs.c
index 7f236236..08338499 100644
--- a/src/core/strs.c
+++ b/src/core/strs.c
@@ -96,3 +96,17 @@ nni_strlcat(char *dst, const char *src, size_t len)
 	return (n - 1);
 #endif
 }
+
+size_t
+nni_strnlen(const char *s, size_t len)
+{
+#ifdef NNG_HAVE_STRNLEN
+	return (strnlen(s, len));
+#else
+	size_t n;
+	for (n = 0; (n < len) && (*s); n++) {
+		s++;
+	}
+	return (n);
+#endif
+}
diff --git a/src/core/strs.h b/src/core/strs.h
index 741504cd..42ec4997 100644
--- a/src/core/strs.h
+++ b/src/core/strs.h
@@ -17,5 +17,6 @@ extern char * nni_strdup(const char *);
 extern void   nni_strfree(char *);
 extern size_t nni_strlcpy(char *, const char *, size_t);
 extern size_t nni_strlcat(char *, const char *, size_t);
+extern size_t nni_strnlen(const char *, size_t);
 
 #endif // CORE_STRS_H